COMPARATIVE ANALYSIS OF THE TECHNICAL CHARACTERISTICS OF THE NEW ELECTRIC LOCOMOTIVES SERIES "2O `ZELR " AND "3ES5K"

COMPARATIVE ANALYSIS OF THE TECHNICAL CHARACTERISTICS OF THE NEW ELECTRIC LOCOMOTIVES SERIES "2O `ZELR " AND "3ES5K"

Shohruh Kahramonov

Assistant of “High-speed electrical rolling stock”, department of Tashkent State Transport University,

Uzbekistan, Tashkent

Nurilla Ermatov

Assistant of “High-speed electrical rolling stock”, department of Tashkent State Transport University,

Uzbekistan, Tashkent

Jasurbek Sobirov

Assistant of “High-speed electrical rolling stock”, department of Tashkent State Transport University,

Uzbekistan, Tashkent

СРАВНИТЕЛЬНЫЙ АНАЛИЗ ТЕХНИЧЕСКИХ ХАРАКТЕРИСТИК НОВЫХ ЭЛЕКТРОВОЗОВ СЕРИЙ «2O`Z  ELR» И «3ЭС5К»

Карамонов Шохрух Наримон угли

ассистент кафедры «Высокоскоростной электроподвижной состав» Ташкентский государственный транспортный университет,

Узбекистан, г. Ташкент

Эрматов Нурилла Хайруллаевич

ассистент кафедры «Высокоскоростной электроподвижной состав» Ташкентский государственный транспортный университет,

Узбекистан, г. Ташкент

Собиров Жасур Содиржон угли

ассистент кафедры «Высокоскоростной электроподвижной состав» Ташкентский государственный транспортный университет,

Узбекистан, г. Ташкент

ABSTRACT

The article compares the technical characteristics of new electric locomotives of the “2O`ZELR "and" 3ES5K", which were acquired by JSC "Uzbekiston temir yullari" and are operated on the railways of the Republic of Uzbekistan. A comparative analysis of traction and braking characteristics, power electrical circuits, mechanical part, layout of electrical equipment of electric locomotives of the series "2O`ZELR " and "3ES5K". Methods: A comparative analysis of the technical characteristics of new generation electric locomotives is carried out on the basis of a systematic approach. Results: The stages of development of traction support are considered on the example of the railway lines of the Republic of Uzbekistan. The technical characteristics of electric locomotives of the series "2O`ZELR "and" 3ES5K "in terms of high reliability of the traction drive and the implementation of greater traction force due to axial control compared to electric locomotives of the previous series. Practical significance: Application in operation of electric locomotives of the “2 O ` Z ” series ELR "and" 3ES5K "on new electrified railway sections reduces the cost of maintenance and repair, and also allows you to increase the average weight of the train and freight turnover in the areas of operation with a mountain profile.

АННОТАЦИЯ

В статье проводиться сравнение технических характеристик новых электровозов серий «2O`Z ELR» и «3ЭС5К», которые были приобретены АО «Узбекистон темир йуллари» и эксплуатируется на железных дорогах Республики Узбекистан. Проведён сравнительный анализ тяговых и тормозных характеристик, силовых электрических схем, механической части, компоновки электрооборудования электровозов серий «2O`Z ELR» и «3ЭС5К». Методы: Сравнительный анализ технических характеристик электровозов нового поколения производится на базе системного подхода. Результаты: Рассмотрены этапы развития тягового обеспечения на примере железнодорожных линий  Республики Узбекистан. Определены технические характеристики  электровозов серии «2O`Z ELR» и «3ЭС5К» в части высокой надёжности тягового привода и реализации большей силы тяги за счёт поосного регулирования по сравнению с электровозами предыдущих серии. Практическая значимость: Применение в эксплуатации электровозов серии «2O`Z ELR» и «3ЭС5К» на новых электрифицированных железнодорожных участках снижает затраты на техническое обслуживание и ремонт, а также позволяет увеличить средний вес поезда и грузооборот на участках эксплуатации с горным профилем.

Keywords: electric locomotive, 3ES5K, 2O`ZELR , axis regulation, recuperation, traction and braking characteristics, power circuits, electrical equipment, control system.

Ключевые слова: электровоз, 3ЭС5К, 2O`Z ELR, поосное регулирование, рекуперация, тяговые и тормозные характеристики, силовые электрические схемы, электрооборудования, система управления.

Introduction.

Today JSC "Uzbekistan Temir Yollari" is a unified transport infrastructure providing safe and reliable transportation services to the Uzbek people, including the International community. The emerging need to update the locomotive fleet with modern electric locomotives and with an increase in the volume of transportation of passengers and transit cargo was the reason for the purchase of new electric locomotives of the 2 O ` Z series ELR " and "3ES5K". Two section electric freight locomotive 2 O ` Z The ELR was built by the Chinese company CNR Dalian Locomotives by order of Uzbekistan Temir Yollari JSC. Another new three-section freight electric locomotive 3ES5K was purchased from the Novocherkassk Electric Locomotive Building factory. New electric locomotives will provide high reliability in operation and on new electrified railway sections will reduce maintenance and repair costs, as well as increase the average train weight and freight turnover on operating sections with a mountain profile.

For reasonable use of modern traction rolling stock on the railways of Uzbekistan, we will compare the technical and economic indicators and design features of electric locomotives of the “2 O ` Z ” series ELR " and "3ES5K".

The main characteristics of electric locomotives "2O`ZELR" and "3ES5K".

Uzbekistan Temir Yollari JSC cooperates with the Chinese state holding company CRRC Group ( China railway rolling Stock Corporation - "China Railway Rolling Stock Corporation"). This is the fourth generation of electric locomotives, which were assembled by order of Uzbekistan Temir Yollari JSC [3]. In terms of technical parameters, the purchased traction rolling stock corresponds to the climatic conditions of our region and its geographical features with difficult mountainous terrain.

Two-section six-axle AC freight electric locomotive of the 2O`Z ELR series (Figure 1a):

a) The electric locomotive is equipped with asynchronous traction motors; equipped with an asynchronous traction electric drive, traction converters based on IGBT transistors, a microprocessor control system, axial control of traction and braking force.

Figure 1a. The appearance of the electric locomotive series "2O`ZELR "

b) The power supply circuit of electric motors includes four-quadrant converters and autonomous voltage inverters [1]. Traction converters of the company are built on the element base of Toshiba. They are designed in such a way that the power supply circuit of each of the engines operates autonomously and does not depend on others. Failure of one of the converters of this motor will not affect the operation of other motors, which greatly simplifies the operation process;

c) The electric locomotive is provided with a network monitoring system that allows the electric locomotive to carry out intelligent diagnosis of the failure of the traction circuit, auxiliary circuit, control system and braking system during movement in real time.

f) The design of the mechanical part is designed in such a way as to ensure travel speeds up to 120 km/h. Three-axle bogies of locomotives provide for appropriate suspension of traction motors (Figure 1b) . Bandage type wheels.

Figure 1b. Three-axle bogie of electric locomotive series “2O`ZELR "

Modified freight main AC electric locomotive 3ES5K (ERMAK) with axial regulation of traction force and independent excitation of traction motors (TED) of the Novocherkassk Electric Locomotive Plant successfully passed traction and energy tests at the sites of the Republic of Uzbekistan (Figure 2a).

Electric locomotives 3ES5K, manufactured in a three-section design, are designed for operation on railways electrified on alternating current of industrial frequency with a rated voltage of 25,000 V.

The electric locomotive is designed to operate at a voltage in the contact network from 19,000 to 29,000 V, an ambient temperature from minus 50 to plus 50 ° C (maximum operating value) and an altitude of up to 1200 m above sea level. Electrical equipment installed in the body of an electric locomotive is designed for operation at ambient temperature from minus 50 to plus 60 ° С.

Figure 2a. Appearance of an electric locomotive of the 3ES5K series

a) The microprocessor system controls the electrical equipment of the 3ES5K mainline electric locomotive in the mode of traction and electric (regenerative) braking, diagnosing the state of this equipment by displaying appropriate messages on the display of the indication unit located on the driver's console.

b) The electric locomotive has a passage from the control cabin of the head section to the control cabin of the tail section through the booster section.

c) Three-section electric locomotive 3ES5K consists of two head (tail) sections and a booster section, which is manufactured without a driver's cab. Two-axle bogies of locomotives provide for appropriate suspension of traction motors (Figure 2b) . Bandage type wheels.

Figure 2b. Two-axle bogie of an electric locomotive of the 3ES5K series

e) The booster section has a set of equipment that ensures the operation of the electric locomotive in traction and regenerative braking modes with the control of one locomotive crew from the cabins of the head or tail sections. The current collector is not installed on the booster section.

f) The booster section has transition platforms with a balloon-type seal in both end walls for the passage of service personnel. The equipment and electrical circuits that ensure the operation and life of the cabin are not installed on the booster section.

Table 1.

Table 2.

Traction and braking characteristics of electric locomotives

The starting traction force of the electric locomotive of the 2 O ` Z - ELR series is 980 kN, which is 40.8% more than the 3ES5K. In terms of braking performance, the difference reaches 9.7%, which can be seen in Fig. 2, a, b. An increase in the starting and braking characteristics of an electric locomotive is achieved through the use of new TEDs with a capacity of 12 0 0 kW and axial regulation [3, 4].

Figure 3. Traction and braking characteristics electric train: electric locomotive series: a - "2O`ZELR ", b - "3ES5K"

Mechanical part of electric locomotives

The body and mechanical part of the electric locomotive series "2O`ZELR " were designed by the Dalian Locomotive and Carriage Building Company LTD (PRC). The body of a freight electric locomotive (see Fig. 3a) is made on the basis of the body of an electric locomotive of the HXd 3A series (Chinese six-axle serial AC electric locomotive HXd 3 A , built in 2010 by the Dalian Locomotive and Carriage Building Company LTD of China ), and is largely unified with it. The main features of the mechanical part are that the electric locomotive has two three-axle bogies (Fig. 1b), characterized in that they more easily overcome the unevenness of the floor [6].

The design and manufacture of the mechanical part of the electric locomotive of the 3ES5K series was carried out by the Novocherkassk Electric Locomotive Plant (Fig. 3b). The main features of the mechanical part are that the electric locomotive has two biaxial pivotless bogies (Fig. 2b). The longitudinal connection of the bogies with the body is carried out by means of rods from each bogie to the body, working in tension - compression. The advantage of two-axle bogies is that they fit well into curves at high speeds. In addition, the axles of these bogies can be located closer to the coupling axles, which provides less stress on the superstructure of the track, and, finally, they have a better ability to self-align (lack of slant) relative to the rail lines [5].

Figure 4. Appearance of electric locomotives of the  “2O`Z ELR " (a) and "3ES5K" (b)

Features of the electrical circuit

The features of electric circuits of electric locomotives include the type of traction converters of electric locomotives of the series "2O`ZELR » are equipped with IGBT transistors, which improves the quality of traction drive control due to higher frequency response of transistor modules. The diagram of voltages and currents of the phase of an autonomous voltage inverter (AVI) is shown in fig. 4 [4-5].

Unlike electric locomotives of the 3ES5K series, the traction converter is variable-constant-variable. The electrical part of electric locomotives of the 3ES5K series (Fig. 5b) is manufactured according to the patent of Siemens AG. In the development of the electrical part of electric locomotives of the series “2O`ZELR ”(Fig. 5a) was attended by Toshiba [6].

Figure 5. Schematic diagram of an electric locomotive of the series " 2O`ZELR " (a) and "3ES5K" (b)

Conclusion

New electric locomotive series “2O`ZELR" is designed for operation in difficult mountain conditions and has a number of advantages compared to electric locomotives from other manufacturers. In particular, the power consumption for train traction here is lower by 5-8% due to the use of axis-by-axle regulation, regenerative braking and increased power, which makes it possible to drive freight trains weighing 2500-2700 tons in mountainous conditions with difficult terrain.

References:

1. The use of an electric locomotive with a four-square converter on the railways of Uzbekistan, Radzhibaev D. O., Abstract of the dissertation for the degree of candidate of technical sciences / St. Petersburg State University of Communications. St. Petersburg. 2011.
2. Plaks A. V. Control systems for electric rolling stock: textbook. for universities - d. transp. / A. V. Plaks // - M: Route, 2005. - 357, p.
3. Tursunov Kh. M. Modern electric locomotives for the railway of the Republic of Uzbekistan / Kh. M. Tursunov // Technical sciences - from theory to practice: Sat. Art. by materials. VI Intern. scientific-practical. conferences. - Novosibirsk: SibAK, 2012. - C . 75-78.
4. Volvich A.G. Control systems for electric rolling stock on a modern element base / A.G. Volvich, V.N. Plis, B.I. Khomenko // Sat. scientific Proceedings of Vseros. n.-i. and project. construct. in-t of electric locomotive building. - Novocherkassk, 1999. - No. 41. - S. 27-32.
5. Mileshin V. Application of microprocessors in control systems of transistor rectifiers / V. Mileshin, D. Ovchinnikov // Power electronics. - 2005. -No.4.-P.50–53.
6. Official website of JSC "Uzbekiston temir yullari" www . railway . uz